Stone assembly for honing tools



Feb. 17, 1948. J KLlNE 2,436,215

STONE ASSEMBLY FOR HONING TOOPS Original Filed May 3, 1940 .IN VEN TOR. fix? E lf/a'ne.

Patented Feb. 17, 1948 STONE ASSElVIBLYFQR HONING TOOLS John Kline, Grosse Pointe Farms, Mich., assignor to Micromatic Hone Corporation, Detroit, Mich, a corporation of Michigan Original application May "3, 1940, Serial No. 333,195, vnow Patent No. 2,349,628, dated May 23, 1944. Divided and this application May- 19,

1943, Serial No. 487,560

Claims. I germ-204) which issued as Patent No. 2,349,628 on "May 23, 1944.

In. my co-pending application, which issued into Patent No. 2313,1442 on March 9, 1943, I have illustrated. an internal type of tool for accurately'honing internal surfaces, the claims of which were drawn of a breadth to also cover external .typecf honing. .In this disclosure, a

tool was providedfhav'ing a honing head comprising a plurality of honing stones having extended'in indented portions which nest with each .other to provide a continuous circumferential abrasive surface so thata final operation may be performedin reciprocation only to provide fin- -is'h marks throughout the cylindrical surface .of the workpiece which are parallel to the axis thereof. "This finish simulates the finishon internal or external cylindrical surface which have-been in operation over a considerable period of time. Suchafinis'h produced by a honing tool eliminates the friction and resulting heat and the resulting damage which occurs during the running in operation of reciprocating cylindrical surfaces.

The present invention contemplates the use of diagonally disposed abrasive sticks toproduce the "overlapping between adjacent sticks so that the reciprocation of the tool will produce machining over the .entire cylindrical surface. The invention applies particularhwto the tool for operating on the external cylindrical surface since the width and spacing at. the working surface vmay readily be maintained throughout the thick ness of the abrasive stone.

.According'ly, the main objects of my invention are to provide a tool for machining cylindrical surfaces of workpieces which have abrasive stones which are diagonally disposed to have the stones overlap; to provide an external type of honing tool with a plurality of holders having diagonally disposed stones which nest when extended to a particular diameter with adjacent stones in overlapping relation to each other relative to the planes through the axis of the tool; to provide an external type of honing tool with diagonally disposed abrasive sticks which are adjacently disposed to have the adjacent stones overlapping within a predetermined diameter range and having means forv adjusting the abras'ive stones within said range; and in general to provide an external type of honing tool which completely fmachines an external surface when the hone is moved in reciprocation, all of which is simple in construction and positive of operation.

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the accompanying drawings, wherein; V

Figure 1 is a view in elevation, with parts broken away, illustrating a machine operating a honing tool embodying my invention;

Fig. 2 is an enlarged'broken sectional view of the tool illustrated in Fig. 1;

Fig. 3 is a sectional view of the structure illustrated'inFig. 2, taken on the line 33 thereof;

Fig. '4 is asectional view of the structure illustrated in'Fig. 2, taken on the line 4-4 thereof; and

Fig.5 is a perspective view of a stone and stone holder employed in the tool illustrated in Fig. 2.

'InFig. 1, I'have illustrated a workpiece III in the nature of av piston, the outer surface of which to be machined by an external type of honing tool II suspended on a shaft I2 mounted in a housing ,-I3 which is reciprocated. The housing is supported on a pistonrod I4 mounted on the end of-a piston I5 which is disposed in a cylinder I 6. The shaft I2 has a gear I! keyed thereto within the housing. I3 and mated with a pinion f 8 within the housing which is driven by a spline shaft IS. The housing is guided in its pathof reciprocation bya rod 2| over which an arm 22 on the housing slides.

Fluidis admitted to one or the other end of the cylinder through a solenoid operated valve 23, the solenoid of which is controlled by an electrically operated time switch 24. A motor 25 drives through a clutch 2B the spline shaft 19 to produce'the rotation of the tool II. A solenoid 21 is connected to the clutch 26 for interrupting the rotation of the tool after a predetermined time of operation controlled by the time switch 28.

In operation, the housing I3 and tool I I are reciprocated to have the honing sticks of the tool I I pass over the workpiece a sufficient amount to permit the expansion of the stones to occur within the working range of the tool. This is accomplished by the engagement of a projection 29 on the arm 22 with the cam block 3| of a valve 32 to maintain the valve in open position. At the same time the motor 25 is energized to rotate the tool II for a time controlled by a time switch 28. Upon the operation of the time switch 28, the clutch 26 interrupts the operation of the tool rotation and the operation is continued in reciprocation only. During the rotation of the tool, the stones were worn to the shape of the cylinder so'that during the reciprocating cycle the honing will occur throughout the cylindrical bottom having a plurality of slots 36 for receivmg the ends 31 oflthe-stone carriers 38. A pair of spring rings 39 bias the carriers radially outwardly from the tool axis. A plurality of pins 41 extend through the body 34 in engagement with the rear faceof the carriers 38. The outer ends of the pins engage cam surfaces 42 pro- .vided onindividual cam elements 43.

Springs 44 are employed for moving the cam elements 43 Inpwardly to thereby permit the movement of the stone carriers outwardly when urged by the springs 39.

An outer sleeve 45 encompasses the body and the cam elements and forms an annular cylinder '46 in which an annular piston 41 is disposed. in engagement with the upper ends of the cam elements 43." Anlannular. channel-shaped gas- 'ket 48 provides a seal for the piston. An annular sleeve 49 is mounted on thebody 34 retained in position by a pair of nuts A conduit 52 demarks disposed parallel to the axis of the surface.

While I have described and illustrated but a single embodiment of my invention, it will be apparent to those skilled in the art thatvarious changes, omissions, additions and substitutions may be made therein without departing from the spirit and scope of my invention, as

livers oil or other fluid from the valve 33 to the annular ring 49 and then to the cylinder 46.

' Each of the stone carriers 38 is provided with astone 54 which is rhomboidal in shape and preferably having an arcuate face. By having the sides parallelthe gap betweenthe stones will not vary. when the faces are adjusted to a particular diameter and to larger or smaller diameter than the particular diameter for which the tool was constructed. This variation in diameter, however, will be limited to the degree of slope provided to the abrasive stone which piece for producing a honing operation and thereafter reciprocated without being rotated for producing a finished surface with the finish set forth in the accompanying claims.

What I claim is:

1. In an abrasive unit for a honing tool, a carrier having a body portion and aligned projecting end portions, the longitudinal axis of the body portion being disposed at an angle to the longitudinal axis of the projecting portions, and a stone secured to said body portion with its axis aligned therewith.

2. In an abrasive unit for a honing tool, a carrier having a body portion and aligned projecting end portions, the longitudinal axis of the body portion being disposed at an angle to the longitudinal axis of thefprojecting portions, and a stone secured to said body portion with its axis aligned therewith, the projecting face of said stone being of segmental cylindrical form with reference to a center line parallel to the longitudinal axis of the projecting ends of the body portion and which is of helical form relative to the longitudinal axis of thestone.

3. In a stone assembly for a honing tool, a body portion having projecting ends which are in aligned vertical relation, a stone supported by said body portion with the ends disposed in a horizontal plane and the sidesdisposed at an angle thereto which is other. than right angle, the working face of said stone being concave and of segmentalcylindrical shape with reference to a vertical axis. v

' 4. An abrasive element for a honing tool which is substantially square in cross section with one side having a concave segmental cylindrical face, the axis of which is disposed atv an angle to the longitudinal center line of .the abrasive element. v v

5. An abrasive element of elongated rhomboidal shape having one elongated face of concave segmental cylindrical form, the axis of said cylinder being disposed at an angle to the edges of said face. 7 g

JOHN E. KLINE.

REFERENCES CITED The following references .are of record in the file of this patent:

Connor May 11, 1943 

